One popular theme is the 'friends to lovers' trope. It shows the progression of their relationship from just being comrades in the fight against the supernatural to falling in love. Another is the 'hurt/comfort' theme, where one of them gets injured or is in emotional distress and the other provides support.
A common theme is the exploration of their different natures. Dean being more of a human with earthly desires and Castiel being an angel with a different set of values. How they navigate their relationship in light of these differences is often explored. There are also time - travel or alternate universe themes where their relationship might take on different forms or face different challenges compared to the show's canon.
There are fanfic - dedicated forums where users share their works. Check out some Supernatural - focused forums. Sometimes, Tumblr users cross - post their fanfics to these forums. Another option is to ask in Supernatural fan groups on social media platforms. They might be able to point you to some good dean x castiel tumblr fanfics.
One common theme is sacrifice. They often sacrifice for each other in these fanfics, like Castiel giving up his grace or Dean putting himself in danger to save Castiel. Another is the exploration of their unspoken feelings. Since they don't always express their emotions openly in the show, fanfics love to dig into that.
One common theme is loyalty. Castiel is often depicted as extremely loyal to Dean, and this loyalty is tested in various ways in the fanfics. Another theme is sacrifice. They are willing to sacrifice for each other. For example, in many stories, Castiel might sacrifice his angelic powers for Dean.
Another theme is the redemption arc for Castiel. In these fanfictions, Dean plays a crucial role in helping Castiel find his way back from any dark paths he may have tread. For example, some stories show Dean standing by Castiel during his struggles with his angelic nature.
One common theme is loyalty. They are always there for each other in most fanfics, no matter what the situation is. Another theme is the struggle between the human and the supernatural world as Castiel is an angel and Dean is a human hunter.
There are fanfictions with the theme of alternate universes. In these stories, Dean and Castiel experience different versions of their relationship. For example, in one universe they might be rulers of a supernatural kingdom, and in another they could be ordinary humans. These themes add a lot of variety and intrigue to the fanfictions.
Another theme is the struggle between their different natures. Castiel being an angel and Dean being a human hunter. This creates a lot of internal and external conflict in the stories, like in 'The Clash of Worlds' fanfiction where they have to overcome their differences to be together.
A third common theme is the idea of loyalty. Despite the strange circumstances of Castiel being in an 'animal' form, their loyalty to each other remains strong. Fanfictions might explore how this loyalty is tested or strengthened in different situations. It could be through facing external threats or internal emotional struggles, but in the end, their bond endures, which is a key aspect that draws readers to these types of stories.
One popular theme is the re - imagining of their relationship. For example, exploring how a female Castiel would interact with Dean on a more emotional level. Maybe she would be more in touch with her feelings and it could lead to a different kind of dynamic between them.
One common theme is the struggle with identity. Castiel, being an angel, has to come to terms with his love for a human, which goes against the nature of angels in some ways. Another theme is sacrifice. Often in these fics, Castiel is willing to sacrifice a great deal for Dean because of his love.